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Biological leaching process for separating out metal ions from waste battery directly

A waste battery, biological leaching technology, applied in the direction of improving process efficiency, can solve the problems of high processing cost, large investment, large acid consumption, etc., and achieve high metal dissolution rate, good application prospect and low processing cost. Effect

Inactive Publication Date: 2007-08-22
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

Pyrometallurgical technology is complicated, large investment, high energy consumption, and extremely serious secondary pollution; although wet treatment has relatively simple equipment requirements, relatively mild operating conditions, and low energy consumption, it also has a large amount of acid consumption, high processing costs, and secondary pollution. Serious secondary pollution and other problems affect its wide application

Method used

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  • Biological leaching process for separating out metal ions from waste battery directly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Taking chemical extraction and bioleaching to compare the leaching efficiency of metals in three kinds of waste batteries (nickel-cadmium batteries, zinc-manganese batteries, and lithium-ion batteries) as an example, the specific operations are as follows:

[0033] 1) Disassemble the used battery to remove single components such as copper cap, aluminum foil, zinc foil, film, carbon rod, etc., collect the positive and negative electrode materials of the battery with complex composition and the most concentrated metal content, carefully crush them into powder, and pass through a 20-mesh sieve and bottled for later use;

[0034] 2) Prepare, inoculate, and shake several bottles of 100mL culture solution according to the conditions of the acid-producing culture solution. When the pH drops to 2.0, add 1.0g of the electrode mixture material that has been peeled off and put it into the shaker for bioleaching. Add the specified battery at the initial pH value, and then cultivate...

Embodiment 2

[0038] Taking the treatment of waste zinc-manganese batteries by bioleaching technology as an example, the specific operations are as follows:

[0039] 1) same example 1(1);

[0040] 2) Prepare, inoculate and shake several bottles of 100mL culture solution according to the conditions of the acid-producing culture solution (the concentration of sulfur powder is 2.0g / L, 3.0g / L, 4.0g / L respectively). (2.0, 3.0, 4.0), add the specified battery (0.5g, 1.0g, 1.5g), and then cultivate it at a certain temperature (27°C, 35°C, 42°C);

[0041] 3) regularly sample and measure the pH change of the solution and the metal ion concentration change in the solution;

[0042] 4) The experimental results show that when the pH value is 2.0, the sulfur powder concentration is 4.0g / L, and the battery dosage is 1.0g, the dissolution concentrations of zinc and manganese ions in waste zinc-manganese batteries are 500mg / L and 800mg / L respectively. L. While at pH 1.0, the dissolution concentrations o...

Embodiment 3

[0044] Taking the use of bioleaching technology to treat waste nickel-metal hydride batteries as an example, the specific operations are as follows:

[0045] 1)-3) Same example 2(3);

[0046] 4) The results show that: when the pH value is 2.0, the sulfur powder concentration is 4.0g / L, and the battery dosage is 1.0g, the nickel dissolution concentration in the positive electrode material in the waste nickel-hydrogen battery is 1938mg / L respectively. At pH 1.0, the dissolution concentration of nickel in the positive electrode material is 4976mg / L, and the dissolution concentration of cobalt is 240mg / L.

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Abstract

The present invention is biological leaching process for separating out metal ions from waste battery directly, and the green process may be used in supplementing or replacing high temperature chemical leaching with strong acid. The present invention has direct waste battery leaching process with simultaneous acid generating and leaching, and is suitable for all kinds of waste battery. The process of the present invention has lower acid consumption, low cost, high metal leaching rate, mild operation and other advantages, and possesses excellent application foreground.

Description

Technical field [0001] The invention relates to a method for green treatment of waste batteries by using biological leaching technology to directly dissolve metals in waste batteries, which is used in the field of waste battery treatment. Background technique [0002] The pollution of waste batteries has attracted more and more attention at home and abroad. Discarded batteries containing a large amount of metal ions not only pose a huge threat to soil, water and human health, but also cause a huge waste of resources. The current recycling technology of waste batteries has attracted great attention from all over the world and has become a research hotspot. The traditional treatment methods for waste batteries include pyrometallurgy and hydrometallurgy. Pyrometallurgical technology is complicated, large investment, high energy consumption, and extremely serious secondary pollution; although wet treatment has relatively simple equipment requirements, relatively mild operating ...

Claims

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Application Information

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IPC IPC(8): C22B3/18C22B7/00C22B26/12C22B23/00C22B19/00C22B47/00
CPCY02P10/20
Inventor 吴锋辛宝平朱庆荣孙艳李丽
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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